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为研究冬油菜区和春油菜区2地甘蓝型油菜的光合作用差异,以甘蓝型油菜杂交种‘秦杂油3号’为材料,比较了不同光强、CO2浓度和温度条件下2个生态区净光合速率的差别。结果显示:不同生态区甘蓝型油菜净光合速率随光强、CO2浓度和温度变化规律基本相同;春油菜区叶片的光饱和点和光量子效率高于冬油菜区,而光补偿点、光呼吸速率和饱和光强下净光合速率比冬油菜区低;春油菜区叶片的羧化效率比冬油菜区高,而CO2饱和点和饱和CO2浓度下净光合速率则比冬油菜区低,两者的CO2补偿点无显著差异;春油菜区进行光合反应的适合温度范围比冬油菜区宽,在最佳温度下春油菜区的净光合速率低于冬油菜区。结果表明春油菜区叶片的光合能力要强于冬油菜区,对环境的适应性较强。
In order to study the differences of photosynthesis of Brassica napus between two regions of winter rapeseed and spring rapeseed, two hybrids of Qinzaoyou No.3, a rapeseed (Brassica napus L.) were used to study the effects of light intensity, CO2 concentration and temperature on the photosynthesis District net photosynthetic rate difference. The results showed that the net photosynthetic rate of Brassica napus was basically the same with light intensity, CO2 concentration and temperature in different ecotypes. The light saturation point and photon quantum efficiency of spring rapeseed were higher than that of winter rapeseed. The light compensation point, And the net photosynthetic rate under saturated light intensity was lower than that of winter rapeseed. The carboxylation efficiency of spring rapeseed was higher than that of winter rapeseed, while the net photosynthetic rate under CO2 saturation and saturated CO2 was lower than that of winter rapeseed There was no significant difference in CO2 compensation point. The suitable temperature range of photosynthesis in spring rapeseed area was wider than that in winter rapeseed area. The net photosynthetic rate of spring rapeseed area was lower than that in winter rapeseed area at the optimum temperature. The results showed that the leaf photosynthetic capacity of spring rapeseed area was stronger than that of winter rapeseed area, and the adaptability to environment was stronger.